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HRV-3C Protease Cleavage Enzyme, GST Tag, His Tag

Kit Content
1KU or  2.5KUHRV-3C Protease Cleavage Enzyme, GST Tag, His Tag ( lyophilized from 50 mM Tris, 150 mM NaCl, 1 mM EDTA, 0.05% Tween20)
100 μgCleavage Control Protein ( lyophilized from sterile PBS , pH 7.4 )
25ml10X HRV 3C Cleavage Buffer (500 mM Tris-HCl, pH7.0, 1.5 M NaCl, 10 mM EDTA, 10 mM dithiothreitol )
  • Synonym
    HRV 3C Protease, 3C, HRV-3C
  • Source
    HRV-3C Protease Cleavage Enzyme, GST Tag, His Tag is a recombinant form of human rhinovirus (HRV) type 14 3C protease with GST Tag & His Tag produced in Escherichia coli cells at ACRObiosystems.
  • Application
    The high specificity of HRV-3C Protease Cleavage Enzyme, GST Tag, His Tag makes it an ideal tool for cleaving fusion proteins at definite cleavage sites. The fusion protein can be purified and cleaved by HRV-3C Protease Cleavage Enzyme, GST Tag, His Tag obtain the target protein.
  • Unit Definition
    >1 Units/µg. One unit will cleave >95% of 100 µg control fusion protein in 50 mM Tris-HCl, 150 mM NaCl, pH 7.5 at 4℃ for 16 h.
  • Specificity

    The enzyme recognizes the cleavage site: Leu-Glu-Val-Leu-Phe-Gln-↓-Gly-Pro.

  • Formulation
    Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 150 mM NaCl, 1 mM EDTA, 0.05% Tween20. Contact us for customized product format or formulation.
  • Reconstitution
    See Certificate of Analysis for details of reconstitution instruction and specific concentration.
  • 10×Cleavage Buffer
    500 mM Tris-HCl, pH7.0, 1.5 M NaCl, 10 mM EDTA, 10 mM dithiothreitol. Chill to 5℃ prior to use.
  • Storage
    Store at -20℃ after reconstituted. Avoid repeated freeze-thaw cycles.
  • Example

  • Cleavage Protocol

  • Activity Influence Factors

HRV-3C Activity Example
Cleavage Protocol
  1. Make fresh cold cleavage buffer ,recommended typical cleavage buffer is : 50 mM Tris-HCl, pH7.0 (at 25℃), 150 mM NaCl, 1 mM EDTA, 1 mM dithiothreitol. Cleavage buffer should be a buffer in which the target protein is soluble. There should be no protease inhibitor in the buffer. The cleavage buffer should be compatible with downstream purification processes, e.g. minimal amount of EDTA or DTT if Ni column will be used to remove the cleaved His-tag. HRV-3C Protease is compatible with  500 mM NaCl and 400 mM imidazole.

  2. Dilute the fusion protein pool to 1-2 mg/ml with cold Cleavage Buffer. This is optional in case the target protein aggregates in the buffer. Keep a small aliquot as Uncut sample(Negative Control) to detect a possible unspecific cleavage either by autolysis or by proteolytic contaminations of the fusion protein.

  3. Add GST-HRV 3C protease at a Protease : Target protein ratio of 1 :100 (w/w) (1,000 unit GST-HRV 3C Protease to 100 mg target protein) as initial cleavage condition. The optimal ratio should be determined empirically. A Protease-to-target protein ratio (w/w) of 1:50 to 1:400 should work for most target proteins. There is no need to change buffer or dilute HRV-3C Protease.

  4. Incubate the reaction mixture at 4℃ for 16 hours or overnight. If shorter incubation time is required, more amount of HRV-3C protease or higher temperature (RT) should be implemented. When the cleavage conditions are optimized at a small scale, scale up the cleavage proportionally according to specific application requirement.

Removal of HRV GST-3C Protease:
  1. Use Glutathione Agarose High Flow to remove the HRV GST-3C Protease

  2. If desired, determine and compare the extent of cleavage of the samples by SDS-PAGE analysis.

Experimental Outline:
Removal of HRV GST-3C Protease:

Depending on the buffers used and their chemical components, HRV GST-3C Protease cleavage efficiency may be affected. The following table shows the relative activity of HRV GST-3C Protease under various conditions.


Protease Recombinant is fusion protein of GST and human rhinovirus (HRV) type 14 3C protease.Substrate recognition and cleavage are likely to be dependent not only upon primary structural signals, but also upon the secondary and tertiary structures of the fusion protein as It has been demonstrated that the enzyme exhibits highest activity around neutral pH at temperature ranging from 22 to 37℃, even retaining robust activity at 4℃. Thus, cleavage can be performed at low temperature to enhance the stability of the target protein. The catalytic activity is insensitive to organic solvents (up to 10%); however, it can be strongly stimulated by high concentration of anions such as sulfate.

Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.

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